This is a discussion on trans fluid within the Automatic Transmission forums, part of the Drivetrain category; just wondering if using synthetic trans fluid like amsoil or something would be better? i just got my trans am ...
11-13-2008, 06:24 AM #1
just wondering if using synthetic trans fluid like amsoil or something would be better? i just got my trans am recently its a 98 with 50k on the clock. Id like to flush the old stuff out and put a quality synthetic in there for better protection and mileage. Only way to do this would be to have a shop to the flush right? i know dropping the pan only replaces 3 or 4 quarts.
11-14-2008, 04:21 PM #2
Below is Technical Service Bulletin pdf from Amsoil on automatic transmissions.
Automatic Transmission Fluid and Filter Change Procedures pdf.
Donít forget that Competition Synthetics is offering a 10% discount to LS1.com members for the month of November on Amsoil products.
Amsoil Synthetic ATF link
1998 PONTIAC FIREBIRD 5.7L 8-cyl Engine Code [G]
Automatic Transmission, Total Fill
4 speed 4L60-E..........11.0 quarts
11-14-2008, 11:24 PM #3
Fully synthetic trans fluid is much better than the regular stuff. And our cars deserve the best. But since you have a stock tranny (I assume), you really don't need fully synthetic. For now, drain it yourself and replace your filter and fill it up with 3 - 4 quarts of clean regular fluid. Plus, when want to change to completely synthetic trans fluid, you're going to need around 9 quarts. I would wait until you get a torque converter/stall to change to synthetic trans fluid, that's when you're going to need it. - I recommend Amsoil. Go with the 2.5 gallon, cheaper than buying the quarts.
11-16-2008, 03:33 AM #4
I would not run any type of synthetic fluid in the transmission, just use the Dextron III, and change the fluid and filter every 40K, and you will be o.k.
11-16-2008, 07:58 AM #5
I agree with Steve, I don't care for synthetic fluid in any automatic transmission. I was rebuilding them for a living and just don't like what I have seen. Good old Dexron III does just fine, even in extreme usage from my experiences. My only difference from Steve's recomendation would be to change it a little more often. Since as you mentioned dropping the pan doesn't get much more than 4-5 quarts out of it.
I like to change mine every 10-15,000 miles. As long as I keep up that type of service I have found no need to go with a full transmission flush. I've torn them down after 100,000 miles with 10-15,000 mile service intervals and they look beautiful inside.
11-16-2008, 06:18 PM #6
ok cool thanks guys. ill just drop the pan and change it out with the dexron 3. is the gasket re-usable or should i get a new one?
11-16-2008, 06:43 PM #7
You'll get a new one that comes in the filter kit.
11-16-2008, 07:58 PM #8
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